高速远程滑坡滑震研究述评

REVIEW ON LANDQUAKES RELATED TO ROCK AVALANCHE KINEMATICS

高速运动的滑坡体与下伏不平顺运动路径间的强烈动力相互作用将产生地震波,即滑震。滑震作为一种独特的研究视角,可为高速远程滑坡运动特征的研究提供前所未有的细节化体现和无与伦比的定量化数据支撑。通过对国内外已有研究成果的归纳梳理,对高速远程滑坡滑震研究的发展过程和研究现状进行了概略性述评:首先,对滑震相关研究近百年来的历史进程和发展趋势进行了归纳;其次,通过对比不同运动行为产生滑震信号的过程,阐述了滑震波的典型信号特征;进一步地,基于不同频段的滑震信号特征,从高速远程滑坡基本特征识别、高速远程滑坡运动学过程和运动特征推演等方面,对现有研究成果进行了述评,探讨了滑震手段推进高速远程滑坡动力学研究的重要贡献和巨大潜力;在此基础上,从滑震数据库的建立和完善、滑震波动机理理论模型的优化与发展、滑震波与滑坡接触力的耦合分析以及多学科交叉融合4个方面对下一步的研究工作进行了讨论和展望。

The intensive and continuous interactions between the high-speed surficial mass movements and the underlying rugged topography can generate seismic waves,which is referred to as“landquakes”.As a unique research perspective,the research of landquake can provide unprecedented details and unparalleled quantitative data on the exploration of rock avalanche kinematics.This paper presents a systematic review of the representative achievements in the rock avalanche kinematics and the generated landqukes.In particular,it briefly reviews the diachronic process and present status of this field.Then,this paper analyzes the typical kinematic behaviors of rockfalls,rock avalanches and debris flows in terms of their seismic manifestations,and describes the general signal characteristics.Furthermore.This paper reviews the benefits of seismic methods in the toolkit for studying the key properties of rock avalanche processes,and discusses the potential for landquakes with different frequency content to drive advances in our understanding of rock avalanche dynamics.On these bases,the future directions toward seismological research on rock avalanche dynamics are analyzed and discussed.Future works that should be focused are proposed,including setting up better datasets,modeling improvements,integration between basal force fluctuations and landquakes,and deepening of interdisciplinary integration.